It’s Flag Day, a day that honors the adoption of the United States flag on June 14, 1777. The original resolution declared the flag would have 13 alternating red and white stripes and a blue field with 13 white stars, representing a new constellation — a powerful symbol of unity and independence that continues to fly proudly today.

What's the history behind the American flag? What do the different colors of the flag represent? Here's what we know about Flag Day.